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Method and device for eliminating co-channel interference

A technology of same-frequency interference and interference elimination, applied in the field of communication, can solve problems such as inaccuracy and large errors, and achieve the effect of improving accuracy and reducing errors

Active Publication Date: 2015-09-09
HONOR DEVICE CO LTD
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Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for eliminating co-channel interference, so as to solve the problem of large error and inaccuracy in existing co-channel interference cancellation

Method used

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  • Method and device for eliminating co-channel interference
  • Method and device for eliminating co-channel interference

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no. 1 example

[0035] see figure 2 , is the flow chart of the first embodiment of the method for eliminating co-channel interference of the present invention:

[0036] Step 201: Select at least two regions in the time-frequency domain.

[0037] In the communication system, for each selected area, the time domain in the time-frequency domain contains several consecutive OFDM symbols, the frequency domain contains several consecutive subcarriers, and each area contains several receiving symbols in the time-frequency domain. The pilot point of the signal. In this embodiment, preferably, two regions are selected in the time-frequency domain, namely the first region and the second region, and the number of pilot points included in the two regions is different. The first area and the second area can be selected according to certain criteria combined with actual simulation results.

[0038] For example, a selection criterion is: the first area needs to ensure that the interference autocorrelati...

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Abstract

The embodiment of the invention discloses a same frequency interference elimination method and a same frequency interference elimination device. The method comprises the following steps that: at least two regions are selected on a time frequency domain; interference autocorrelation matrixes of each region in at least two regions are calculated; the existence conditions of the same frequency interference are judged according to the interference autocorrelation matrixes of each region, and one interference autocorrelation matrix is obtained from the interference autocorrelation matrixes in the at least two regions; and received signals are subjected to interference elimination through the obtained interference autocorrelation matrixes. According to the embodiment of the invention, because at least two regions are selected on the time frequency domain for carrying out interference autocorrelation matrix calculation, the current same frequency interference conditions can be obtained through the comparison, the interference autocorrelation matrix selection can be carried out according to comparison results, the accuracy of the interference autocorrelation matrixes can be improved, the proper interference autocorrelation matrixes can be obtained through the selection for received signals with different same frequency interference degrees, and the interference elimination errors are reduced.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for eliminating co-channel interference. Background technique [0002] In LTE (Long Term Evolution, Long Term Evolution) proposed by 3GPP, MIMO (Multiple-Input Multiple-Output, Multiple Input Multiple Output) technology and OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology are used for communication. When sending data in the downlink, different users in the same cell occupy different subcarriers to achieve multiple access, but users in adjacent cells may use the same frequency band for data transmission. At this time, co-frequency interference may occur between adjacent cells. Reduce the reliability of data communication. [0003] In the prior art, in order to suppress co-channel interference between adjacent cells, an area can be first selected in the time-frequency domain. The time domain in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03
Inventor 李景玉江长国
Owner HONOR DEVICE CO LTD
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